81.1% is the change from 455 to 824
Calculation steps:
[( 824 - 455 ) ÷ 455] x 100 = 81.1%
Formula
Percentage change = [(824 - 455) / 455] x 100
Subtract the new number by the original number
824 - 455 = 369
369 ÷ 455 = 0.810989010989011
0.810989010989011 x 100 = 81.1%